package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c=new ArrayList();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        boolean b=c.add(new Point(1,2));
        System.out.println(b);//对于HashSet集合而言为false，因为是否重复取决于元素的equals
        System.out.println(c);


        Point p=new Point(1,2);
        boolean b1=c.contains(p);
        System.out.println("是否包含:"+b1);

        boolean remove=c.remove(p);
        System.out.println("是否删除:"+remove);
        System.out.println(c);

    }
}
